Cosmic Ruler: Inflection Point Instead of Peak ⚡ экспресс
Original: "The Linear Point Standard Ruler with DESI DR1 and DR2 Data"
Astrophysicists have found a new reference point in galaxy distribution — an inflection point that remains unchanged even after billions of years.
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A sand dune gave astronomers a new cosmic ruler. Just as a dune's steepest slope is more stable than its crest, so too on the galaxy distribution graph does a special 'inflection point' blur less with time. This method, tested on DESI data, promises to measure dark energy more accurately and understand where the universe is heading.
🎯 The theoretical idea has been around since the 2010s, but only DESI's unprecedented maps allowed it to be used with sub-percent precision — and it turned out that the inflection point is more informative than the blurred peak.
\alpha_{\text{iso,LP}} = \frac{r_{\text{мод}}}{r_{\text{набл}}}
The ratio of the expected size of the linear point in the model to the actually measured one; if α equals 1, the model is accurate, if not, the expansion proceeds differently.